Open Domain Question Answering (ODQA) is a task to find an exact answer
to any question in Wikipedia articles. Thus, given only a question, the system outputs
the best answer it can find.
The default ODQA implementation takes a batch of queries as input and returns the best answer.

The architecture of ODQA skill is modular and consists of two models,
a ranker and a reader. The ranker is based on DrQA1 proposed by Facebook Research
and the reader is based on R-NET2 proposed by Microsoft Research Asia
and its implementation3 by Wenxuan Zhou.